Tire-pump.



T. H. NIELSEN.

TIRE PUMP.

APPLICATION FILED MAY I3. 191s.

Patented Dec.. 24, 1918.

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T. H.. NIELSEN.

TIRE PUMP.

APPLICATION. FILED M.A.Y 13, |918.

Patented Deo. 24, 1918.

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THOMAS H. NIELSEN, OF WYOMING, DELAWARE.

TIRE-Porri?.

j Application filed May 13,1918. Serial No. 234,231.

To all whom t may conce/rn Be it known that I, THOMAS H.'N1nLsnN, a

citizen of the United Stateafresiding at lVyoming, in the county f'Kentand State of Delaware, have invented certain new and useful Improvementsin Tire-Pumps; and 1 do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame, reference beinghad to the accompanying drawings, and to theletters and figures of reference marked thereon, which form a part ofthis specification.

This invention relates to new and useful improvements in tire pumps andconsists in the provision of a double set of cylinders y geared togetherand forming a double acting pump, va suitable valve mechanism beingprovided and which is automatically operated to permit a continuous Howof air to pass from the-pump.

My invention consists in the provision of further various details ofconstruction, combinations and arrangements of parts which will behereinafter fully described, shown. in the accompanying drawings andthen specifically del-ined in the appended claims.

1 illustrate my inventioniin the accompanying drawings which, with theletters of reference marked thereon, form a part of this applic-ationand in which:

Figure 1 is a top plan view of the pump.

- Fig. 2 is a side elevation.

' Fig. 3 is an end vlew.

Flg. 4 1s a horizontal sectional view Fig. 5 is a sectional View on lineFig. 6 is a sectional view on line 6-6 of Fig. 1.1

Reference now being had to the details of the drawings by numerals:v l

ldesignates the base upon which the four pump cylinders, designatedrespectivelyT by numerals 2, 3, 1- and 5 are mounted. vThe cylinder 2has a valved opening 2X at one end and a pipe 3X communicates betweenthe cyli inders 2 and 3. The cylinder 2 has a piston,

the piston shown in .dotted lines in Fig. 1 of thedrawings, mountedtherein and which is connected to a stem 6, which is also secured to inthe cylinder 4. Said stem 6 is provided with a series of rack teeth 7thereon and which mesh with the gear wheel 8 Specification of LettersPatent.

Patented Dec. 24, 1913.

the medium of the segmentbeveled gear 12,

which `has an integralcolla'r 13 journaled upon the horizontallydisposed shaft14, also mounted in the frame 10. A handle 15 is providedwith an integral collar 16 mounted upon the shaft 14 to which it iskeyed, and serves as a means for rocking the shaftl 14, when it isdesired to cause arocking movement to be imparted to the segment gear12, by which the piston 6 may be rcciprocated.

A piston stem 18, similar to the stem 6, has a piston mounted upon oneend which rocks within the cylinder 3 and a piston upon its otherendfrocking within the cylinder 5, and is provided with rack teeth 2which are also in mesh with the gear wheel 8.

Each cylinder, one of which is shown in longitudinal section in Fig. 4,is provided with a valved opening 21 in one end, and 22 is a valve whichis hinged to the plate 23, shown in Fig. 5 of the drawings,which isfastened to the end 24 of thecylinder. A spring 25 fastened to the plate23 tends to normally hold the valve 21 seated. A pipe 26 leads from thevalved opening in the end of the cylinder 5 and communicates with anaperture in the end of the cylinder 4, the end of the latter beingprovided with a valved inlet opening 28 through which air is drawn intothe cylinder 4. A pipe 30 leads from an aperture 3.1 in the cylinder 5,as shown in Fig. 4 of the drawings, and 32 yis a T-shaped elbow, adetail of which is shown in Fig. G, and with which one end of the pipe30 communicates, while another pipe 35 also communicates therewith, andleads to and communicates with an aperture in the outer end of thecylinder 3. A cylindrical valve 36 mounted in the elbow 32 is adapted tomove therein against the adjacent ends of the pipes 30 and 35automatically, for the purpose of closing the exit endv of one pipe orthe other according as one set of pumps or the other are being operated.

A pipe 37 leads from the elbow 32 and conics l the stem 18 will foreethe air from the eylin der 25 through the pipe 35 and will foree thevalve I'll to the posith'in' shown in dotted lines and n ainst the endot' the pipe. 30, permittin; r air to make exit through the pipe,

23T. sthe piston in the cylinder fi is thrown outward"` the pistonwithin the (Zylinder 4 will ha\ 'e foreed air therein through the pipe26l into the cylinder and air is hein;r drawn into the cylinder 2. 'hentheI lever 'is swung' back to the. position shown in l"i 2 of thedran'ilujs` the operation is reversed, the valve I'l heine thrown hackto the position shown in solid lines in Fig, 0f the, drawings,permitting the nir in the eylinder 5 to esi-.npc through the pipes il()and 25T.

Uy, the arrangement of the operatingr ele-- n'ientsf;` as set Forth,eons'lstm,"r of a gear wheel always exerting' the same foree, at

I).O--.p\oints `diametrieally opposite its periphery 'u upon the raekhars formimgr the, pistons of the two sets o'l'Wry mders. a smoothrunning effect is obtained )y the lmlanedjuifomlition of the operatim:`elements, and"\\lri'eli eomprises an advantage m the use olfour singleacting' eylinders. instead of double acting` ones.

What l elaim to he new is:

A double acting tire pump7 eomprising pairs ot' pump Cylinders arrangedl(andern. and in planes parallel to aeh other7 pistons within saidcylinders` piston stems connecting' the pistons which are in alinementand provided with rai-h' teeth upon their inner edges, a yoke extending!over .said piston the raek teeth on said stems, a liereled pinion fixedtothe vertical shaft, a sleeve upon the roek shaft and havingr nnintegral segment member the teeth of whieh are in mesh willi the teethotl the heveled pinion, pi'pesR'oni` mun-ieatin;r between the oppositeends ol" two 'l' thil eylinders whieh are in nlinement, and pipeseonnnunientingthetn'een ei)rrespondineA ends ot' the dill'erent sets ofcylinders.

In testimony whereof I hereunto allixniy signature in preseneeloftwo'witnessesl 'Il IUMAS H.' NIELSEN. Witnesses: l

A. L. Hon-'rui7 FRANKLIN H, Homin.

